IN-DEPTH: The Lineage of the Longines Czech Aviator Chronometre

The so-called "Tartarugone" is a chronometer wristwatch that was produced by Longines for Czech aviators before, during, and after the Second World War. The Tartarugone features a unique case shape and has greatly evolved over time—utilizing three different movements. The second series, which was made in a very limited quantity, is seldom seen in good condition. While the other variations are not as rare, they are a financially-accessible alternative to the higher-priced Longines pilot's watches of the early 20th Century. Let's take an in-depth look at the history of this fascinating wristwatch.

Translated And Edited By Luke Rottman.

STORY + PHOTO GALLERY: Christie's Announces The Top Lots At The Patek Philippe 175th Anniversary Sale

This year, Patek Philippe celebrates their 175th anniversary. In honor of this occasion, Christie's will be hosting the "Patek Philippe 175" sale at the historic Four Seasons Hotel des Bergues in Geneva. One hundred of arguably the world's preeminent timepieces, all displaying Patek Philippe's triumphs and rich heritage, will be auctioned off at the sale that evening. As we near the date, I will certainly provide in-depth reports. Until then, I will discuss my two favorite watches offered at this auction--interestingly enough, both have remained in private hands until now.

A Beginner's Guide To Investing In Vintage Watches: Part II

In part one of "A Beginner's Guide To Investing In Vintage Watches," I dealt with the principal aspects of vintage watch buying, such as the brands, the case materials, and the topic of how specific wristwatches have gained their industy-wide status. Today I will discuss the best sources for buying vintage watches and the significance of foresight.